Verify the signature on user cloud policy downloads.

chrome/browser/policy/policy_builder.h

Index: chrome/browser/policy/policy_builder.h
diff --git a/chrome/browser/policy/policy_builder.h b/chrome/browser/policy/policy_builder.h
index c52dbeb572bc68f296197c68a104f73d357c107c..d45f65e1f54ddc84e3862fbee4afc22a728ab480 100644
--- a/chrome/browser/policy/policy_builder.h
+++ b/chrome/browser/policy/policy_builder.h
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_POLICY_POLICY_BUILDER_H_
 
 #include <string>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ -78,6 +79,12 @@ class PolicyBuilder {
   // Returns a binary policy blob, i.e. an encoded PolicyFetchResponse.
   std::string GetBlob();
 
+  // Writes the public key corresponding to |signing_key_| to |public_key|.
+  void GetPublicKey(std::vector<uint8>* public_key);
+
+  // Writes the public key corresponding to |new_signing_key_| to |public_key|.
+  void GetNewPublicKey(std::vector<uint8>* public_key);
+
   // These return hard-coded testing keys. Don't use in production!
   static scoped_ptr<crypto::RSAPrivateKey> CreateTestSigningKey();
   static scoped_ptr<crypto::RSAPrivateKey> CreateTestNewSigningKey();